Abstract
Functional response of the syrphids Episyrphus balteatus deGeer, Eristalis interruptus (Poda), Eristalis cerealis F. and Sphaerophoria scripta (L.), to Brevicoryne brassicae L. was studied under laboratory conditions to determine their relative preying potential. The 2nd and 3rd instar larvae of the predators were exposed to increasing densities of similar sized B. brassicae nymphs in petri dishes. Third instar of Ep. balteatus was found to possess highest consumption (52.8 aphids) closely followed by Er. Cerealis (50.7 aphids), Er. Interruptus (42.10 aphids) and S. scripta (38.7 aphids), All predators and preying stages exhibited type II functional response. The coefficients of attack rate and handling time were found to show significant variation between species and preying stages. The results suggested that third instar larva of Episyrphus balteatus is the efficient predator to regulate B. brassicae colonies.
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Claims 6
Claim · model-written summary
Third-instar Episyrphus balteatus larvae consumed the most aphids, 52.8 per unit.
Verbatim
t0“Cruciferous Vegetables”
e1“Third instar of Ep. balteatus was found to possess highest consumption (52.8 aphids) closely followed by Er. Cerealis (50.7 aphids), Er. Interruptus (42.10 aphids) and S. scripta (38.7 aphids)”
Claim · model-written summary
Er. Cerealis consumed 50.7 aphids, the second highest consumption among the predators.
Verbatim
t0“Cruciferous Vegetables”
e1“Third instar of Ep. balteatus was found to possess highest consumption (52.8 aphids) closely followed by Er. Cerealis (50.7 aphids), Er. Interruptus (42.10 aphids) and S. scripta (38.7 aphids)”
Claim · model-written summary
Er. Interruptus consumed 42.10 aphids.
Verbatim
t0“Cruciferous Vegetables”
e1“Third instar of Ep. balteatus was found to possess highest consumption (52.8 aphids) closely followed by Er. Cerealis (50.7 aphids), Er. Interruptus (42.10 aphids) and S. scripta (38.7 aphids)”
Claim · model-written summary
S. scripta consumed 38.7 aphids.
- Taxon
- Cruciferous Vegetablest0
- Interactor
- aphidsAphidomorphae1pest
- Second interactor
- S. scripta
_Sphaerophoria_scripta_-_Female_dorsal_view.jpg?width=60)
Sphaerophoria scriptae1biocontrol_agent - Outcome
- consumptione1
- Value
- 38.7 aphidse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Sphaerophoria_scripta_-_Female_dorsal_view.jpg?width=500)
Verbatim
t0“Cruciferous Vegetables”
e1“Third instar of Ep. balteatus was found to possess highest consumption (52.8 aphids) closely followed by Er. Cerealis (50.7 aphids), Er. Interruptus (42.10 aphids) and S. scripta (38.7 aphids)”
Claim · model-written summary
All predators and preying stages showed a type II functional response.
Verbatim
t0“Cruciferous Vegetables”
e2“All predators and preying stages exhibited type II functional response”
Claim · model-written summary
Attack rate and handling time coefficients differed significantly between predator species and prey stages.
Verbatim
t0“Cruciferous Vegetables”
e3“The coefficients of attack rate and handling time were found to show significant variation between species and preying stages”